Anyone experience insomnia when weaning off Cymbalta? I was on 90 mg for almost 5 years?

It was ineffective so I dropped to 60 mg for 6 weeks and now I’ve been on 30 mg for a week. I’ve had a hard time sleeping for the last 4 weeks. How long does this last? I’m supposed to be on 30 mg for another 3 weeks and then off completely.